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<font size="4">IDefn.java</font>
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<FONT ID="LN">1   </FONT><A NAME="1"></A><FONT ID="SingleLineComment">// Copyright 2013 Bill Campbell, Swami Iyer and Bahar Akbal-Delibas
<FONT ID="LN">2   </FONT><A NAME="2"></A></FONT>
<FONT ID="LN">3   </FONT><A NAME="3"></A><FONT ID="Package">package</FONT> jminusminus;
<FONT ID="LN">4   </FONT><A NAME="4"></A>
<FONT ID="LN">5   </FONT><A NAME="5"></A><FONT ID="FormalComment">/**
<FONT ID="LN">6   </FONT><A NAME="6"></A> * The IDefn type is used to implement definitions of those things (local
<FONT ID="LN">7   </FONT><A NAME="7"></A> * variables, formal arguments, types) that are named in some context (or
<FONT ID="LN">8   </FONT><A NAME="8"></A> * scope).
<FONT ID="LN">9   </FONT><A NAME="9"></A> */</FONT>
<FONT ID="LN">10  </FONT><A NAME="10"></A>
<FONT ID="LN">11  </FONT><A NAME="11"></A><FONT ID="Interface">interface</FONT> IDefn {
<FONT ID="LN">12  </FONT><A NAME="12"></A>
<FONT ID="LN">13  </FONT><A NAME="13"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">14  </FONT><A NAME="14"></A>     * The (local variable, formal parameter, or local or imported name)
<FONT ID="LN">15  </FONT><A NAME="15"></A>     * definition's type.
<FONT ID="LN">16  </FONT><A NAME="16"></A>     * 
<FONT ID="LN">17  </FONT><A NAME="17"></A>     * @return the definition's type.
<FONT ID="LN">18  </FONT><A NAME="18"></A>     */</FONT>
<FONT ID="LN">19  </FONT><A NAME="19"></A>
<FONT ID="LN">20  </FONT><A NAME="20"></A>    <FONT ID="Public">public</FONT> <A HREF="../jminusminus/Type.java.html">Type</A> type();
<FONT ID="LN">21  </FONT><A NAME="21"></A>
<FONT ID="LN">22  </FONT><A NAME="22"></A>}
<FONT ID="LN">23  </FONT><A NAME="23"></A>
<FONT ID="LN">24  </FONT><A NAME="24"></A><FONT ID="FormalComment">/**
<FONT ID="LN">25  </FONT><A NAME="25"></A> * A definition of a type name. In the first instance, an identifier, but later
<FONT ID="LN">26  </FONT><A NAME="26"></A> * resolved to a local name or an imported name.
<FONT ID="LN">27  </FONT><A NAME="27"></A> */</FONT>
<FONT ID="LN">28  </FONT><A NAME="28"></A>
<FONT ID="LN">29  </FONT><A NAME="29"></A><FONT ID="Class">class</FONT> TypeNameDefn <FONT ID="Implements">implements</FONT> <A HREF="../jminusminus/IDefn.java.html">IDefn</A> {
<FONT ID="LN">30  </FONT><A NAME="30"></A>
<FONT ID="LN">31  </FONT><A NAME="31"></A>    <FONT ID="FormalComment">/** The definition's type. */</FONT>
<FONT ID="LN">32  </FONT><A NAME="32"></A>    <FONT ID="Private">private</FONT> <A HREF="../jminusminus/Type.java.html">Type</A> type;
<FONT ID="LN">33  </FONT><A NAME="33"></A>
<FONT ID="LN">34  </FONT><A NAME="34"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">35  </FONT><A NAME="35"></A>     * Construct a type name definition given its type.
<FONT ID="LN">36  </FONT><A NAME="36"></A>     * 
<FONT ID="LN">37  </FONT><A NAME="37"></A>     * @param type
<FONT ID="LN">38  </FONT><A NAME="38"></A>     *            the definition's type.
<FONT ID="LN">39  </FONT><A NAME="39"></A>     */</FONT>
<FONT ID="LN">40  </FONT><A NAME="40"></A>
<FONT ID="LN">41  </FONT><A NAME="41"></A>    <FONT ID="Public">public</FONT> TypeNameDefn(<A HREF="../jminusminus/Type.java.html">Type</A> type) {
<FONT ID="LN">42  </FONT><A NAME="42"></A>        <FONT ID="This">this</FONT>.type = type;
<FONT ID="LN">43  </FONT><A NAME="43"></A>    }
<FONT ID="LN">44  </FONT><A NAME="44"></A>
<FONT ID="LN">45  </FONT><A NAME="45"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">46  </FONT><A NAME="46"></A>     * The type for this definition.
<FONT ID="LN">47  </FONT><A NAME="47"></A>     * 
<FONT ID="LN">48  </FONT><A NAME="48"></A>     * @return the definition's type.
<FONT ID="LN">49  </FONT><A NAME="49"></A>     */</FONT>
<FONT ID="LN">50  </FONT><A NAME="50"></A>
<FONT ID="LN">51  </FONT><A NAME="51"></A>    <FONT ID="Public">public</FONT> <A HREF="../jminusminus/Type.java.html">Type</A> type() {
<FONT ID="LN">52  </FONT><A NAME="52"></A>        <FONT ID="Return">return</FONT> type;
<FONT ID="LN">53  </FONT><A NAME="53"></A>    }
<FONT ID="LN">54  </FONT><A NAME="54"></A>
<FONT ID="LN">55  </FONT><A NAME="55"></A>}
<FONT ID="LN">56  </FONT><A NAME="56"></A>
<FONT ID="LN">57  </FONT><A NAME="57"></A><FONT ID="FormalComment">/**
<FONT ID="LN">58  </FONT><A NAME="58"></A> * The definition for a local variable (including formal parameters). All local
<FONT ID="LN">59  </FONT><A NAME="59"></A> * variables are allocated on the stack at fixed offsets from the base of the
<FONT ID="LN">60  </FONT><A NAME="60"></A> * stack frame, and all have types. Some local variables have initializations.
<FONT ID="LN">61  </FONT><A NAME="61"></A> */</FONT>
<FONT ID="LN">62  </FONT><A NAME="62"></A>
<FONT ID="LN">63  </FONT><A NAME="63"></A><FONT ID="Class">class</FONT> LocalVariableDefn <FONT ID="Implements">implements</FONT> <A HREF="../jminusminus/IDefn.java.html">IDefn</A> {
<FONT ID="LN">64  </FONT><A NAME="64"></A>
<FONT ID="LN">65  </FONT><A NAME="65"></A>    <FONT ID="FormalComment">/** The local variable's type. */</FONT>
<FONT ID="LN">66  </FONT><A NAME="66"></A>    <FONT ID="Private">private</FONT> <A HREF="../jminusminus/Type.java.html">Type</A> type;
<FONT ID="LN">67  </FONT><A NAME="67"></A>
<FONT ID="LN">68  </FONT><A NAME="68"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">69  </FONT><A NAME="69"></A>     * The local variable's offset from the base of the current the stack frame.
<FONT ID="LN">70  </FONT><A NAME="70"></A>     */</FONT>
<FONT ID="LN">71  </FONT><A NAME="71"></A>    <FONT ID="Private">private</FONT> <FONT ID="Int">int</FONT> offset;
<FONT ID="LN">72  </FONT><A NAME="72"></A>
<FONT ID="LN">73  </FONT><A NAME="73"></A>    <FONT ID="FormalComment">/** Has this local variable been initialized? */</FONT>
<FONT ID="LN">74  </FONT><A NAME="74"></A>    <FONT ID="Private">private</FONT> <FONT ID="Boolean">boolean</FONT> isInitialized;
<FONT ID="LN">75  </FONT><A NAME="75"></A>
<FONT ID="LN">76  </FONT><A NAME="76"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">77  </FONT><A NAME="77"></A>     * Construct a local variable definition for a local variable.
<FONT ID="LN">78  </FONT><A NAME="78"></A>     * 
<FONT ID="LN">79  </FONT><A NAME="79"></A>     * @param type
<FONT ID="LN">80  </FONT><A NAME="80"></A>     *            the variable's type.
<FONT ID="LN">81  </FONT><A NAME="81"></A>     * @param offset
<FONT ID="LN">82  </FONT><A NAME="82"></A>     *            the variable's offset from the base of the current stack frame
<FONT ID="LN">83  </FONT><A NAME="83"></A>     *            (allocated for each method invocation.)
<FONT ID="LN">84  </FONT><A NAME="84"></A>     */</FONT>
<FONT ID="LN">85  </FONT><A NAME="85"></A>
<FONT ID="LN">86  </FONT><A NAME="86"></A>    <FONT ID="Public">public</FONT> LocalVariableDefn(<A HREF="../jminusminus/Type.java.html">Type</A> type, <FONT ID="Int">int</FONT> offset) {
<FONT ID="LN">87  </FONT><A NAME="87"></A>        <FONT ID="This">this</FONT>.type = type;
<FONT ID="LN">88  </FONT><A NAME="88"></A>        <FONT ID="This">this</FONT>.offset = offset;
<FONT ID="LN">89  </FONT><A NAME="89"></A>    }
<FONT ID="LN">90  </FONT><A NAME="90"></A>
<FONT ID="LN">91  </FONT><A NAME="91"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">92  </FONT><A NAME="92"></A>     * The type for this variable.
<FONT ID="LN">93  </FONT><A NAME="93"></A>     * 
<FONT ID="LN">94  </FONT><A NAME="94"></A>     * @return the type.
<FONT ID="LN">95  </FONT><A NAME="95"></A>     */</FONT>
<FONT ID="LN">96  </FONT><A NAME="96"></A>
<FONT ID="LN">97  </FONT><A NAME="97"></A>    <FONT ID="Public">public</FONT> <A HREF="../jminusminus/Type.java.html">Type</A> type() {
<FONT ID="LN">98  </FONT><A NAME="98"></A>        <FONT ID="Return">return</FONT> type;
<FONT ID="LN">99  </FONT><A NAME="99"></A>    }
<FONT ID="LN">100 </FONT><A NAME="100"></A>
<FONT ID="LN">101 </FONT><A NAME="101"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">102 </FONT><A NAME="102"></A>     * The offset of this variable on the stack frame.
<FONT ID="LN">103 </FONT><A NAME="103"></A>     * 
<FONT ID="LN">104 </FONT><A NAME="104"></A>     * @return the offset.
<FONT ID="LN">105 </FONT><A NAME="105"></A>     */</FONT>
<FONT ID="LN">106 </FONT><A NAME="106"></A>
<FONT ID="LN">107 </FONT><A NAME="107"></A>    <FONT ID="Public">public</FONT> <FONT ID="Int">int</FONT> offset() {
<FONT ID="LN">108 </FONT><A NAME="108"></A>        <FONT ID="Return">return</FONT> offset;
<FONT ID="LN">109 </FONT><A NAME="109"></A>    }
<FONT ID="LN">110 </FONT><A NAME="110"></A>
<FONT ID="LN">111 </FONT><A NAME="111"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">112 </FONT><A NAME="112"></A>     * Initialize this local variable.
<FONT ID="LN">113 </FONT><A NAME="113"></A>     */</FONT>
<FONT ID="LN">114 </FONT><A NAME="114"></A>
<FONT ID="LN">115 </FONT><A NAME="115"></A>    <FONT ID="Public">public</FONT> <FONT ID="Void">void</FONT> initialize() {
<FONT ID="LN">116 </FONT><A NAME="116"></A>        <FONT ID="This">this</FONT>.isInitialized = <FONT ID="True">true</FONT>;
<FONT ID="LN">117 </FONT><A NAME="117"></A>    }
<FONT ID="LN">118 </FONT><A NAME="118"></A>
<FONT ID="LN">119 </FONT><A NAME="119"></A>    <FONT ID="FormalComment">/**
<FONT ID="LN">120 </FONT><A NAME="120"></A>     * Has this local variable been initialized?
<FONT ID="LN">121 </FONT><A NAME="121"></A>     * 
<FONT ID="LN">122 </FONT><A NAME="122"></A>     * @return true or false.
<FONT ID="LN">123 </FONT><A NAME="123"></A>     */</FONT>
<FONT ID="LN">124 </FONT><A NAME="124"></A>
<FONT ID="LN">125 </FONT><A NAME="125"></A>    <FONT ID="Public">public</FONT> <FONT ID="Boolean">boolean</FONT> isInitialized() {
<FONT ID="LN">126 </FONT><A NAME="126"></A>        <FONT ID="Return">return</FONT> isInitialized;
<FONT ID="LN">127 </FONT><A NAME="127"></A>    }
<FONT ID="LN">128 </FONT><A NAME="128"></A>
<FONT ID="LN">129 </FONT><A NAME="129"></A>}
<FONT ID="LN">130 </FONT><A NAME="130"></A></pre>
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